An electronic apparatus includes a first drive bracket and a second drive bracket. The first drive bracket includes a bottom plate. The bottom plate defines a receiving groove and an arc-shaped sliding groove. The second drive bracket includes a top wall. The top wall includes a knob and at least one sliding member formed thereon. The knob is received in the receiving groove to work as an axis. The at least one sliding member is received in the sliding groove, and capable of sliding in the sliding groove to a mounted position. In the mounted position, the top wall of the second drive bracket is aligned with the bottom plate of the first drive bracket.